Delay in voice path

Answered Question
Oct 15th, 2007

I have an issue at the moment with users experiencing noticable delay between calls connecting and both user being able to have two way voice. The H323 gateway has connectivity to the LAN, WAN and the PSTN and therefore has POT and VOIP dial peers to connect to the PSTN and to push calls to the CCM. This issue only affects the PSTN calls inbound to the site and not outbound. Any ideas?

Subset of config

interface Serial0/1/0:15

no ip address

encapsulation hdlc

isdn switch-type primary-net5

isdn incoming-voice voice

no cdp enable

controller E1 0/1/0

pri-group timeslots 1-8,16

dial-peer voice 1 pots

tone ringback alert-no-PI

preference 1

destination-pattern 9T

progress_ind alert enable 8

incoming called-number .

direct-inward-dial

port 0/1/0:15

I have this problem too.
0 votes
Correct Answer by pklos about 9 years 1 month ago

Add this line to your voip dial-peers:

progress_ind setup enable 3

--

regards,

pk

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pklos Mon, 10/15/2007 - 09:44

It is because of interdigit timeout. 'T' sing means everything before timeout, so use '.' and specify number of digits called.

You should do more specific dial-peers for outside prefixes. Dummy example:

# local calls:

dial-peer voice 1 pots

tone ringback alert-no-PI

preference 1

destination-pattern 91........

progress_ind alert enable 8

incoming called-number .

direct-inward-dial

port 0/1/0:15

# international calls:

dial-peer voice 2 pots

tone ringback alert-no-PI

preference 1

destination-pattern 90T

progress_ind alert enable 8

incoming called-number .

direct-inward-dial

port 0/1/0:15

Read also "Matching Outbound Dial Peers" part of this doc: http://www.cisco.com/en/US/partner/tech/tk652/tk90/technologies_tech_note09186a008010fed1.shtml#topic7

--

regards,

PK

Alistair Pidd Mon, 10/15/2007 - 10:52

Hi thanks for the information. I am taking a look, but would this resolution affect calls inbound to the PSTN line because the interdigit timer wouldnt be a factor then would it, and I dont have the issue outbound?

pklos Mon, 10/15/2007 - 13:35

so, what is yours voip dial-peer with CCM numbers?

here's dial-peer to CCM example:

dial-peer voice 2 voip

destination-pattern 93456.

session-target ipv4:172.16.10.10

Alistair Pidd Tue, 10/16/2007 - 00:51

We have one setup to go to each of the CCM's

dial-peer voice 100 voip

tone ringback alert-no-PI

preference 1

destination-pattern 0164..

progress_ind alert enable 8

translate-outgoing calling 1

modem passthrough nse codec g711ulaw

voice-class codec 1

voice-class h323 1

session target ipv4:192.168.8.2

dtmf-relay h245-alphanumeric

fax rate disable

ip qos dscp af11 signaling

no vad

!

dial-peer voice 101 voip

tone ringback alert-no-PI

preference 2

destination-pattern 0164..

progress_ind alert enable 8

translate-outgoing calling 1

modem passthrough nse codec g711ulaw

voice-class codec 1

voice-class h323 1

session target ipv4:192.168.8.1

dtmf-relay h245-alphanumeric

fax rate disable

ip qos dscp af11 signaling

no vad

Correct Answer
pklos Tue, 10/16/2007 - 01:01

Add this line to your voip dial-peers:

progress_ind setup enable 3

--

regards,

pk

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